TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

RARE METAL GRANITE [2 records]

Record 1 2004-07-13

English

Subject field(s)
  • Petrography
  • Geochemistry
CONT

Peraluminous to subalkaline rare metal granites with associated lithium, beryllium, niobium, and tantalum, as well as tungsten and tin mineralization ... are the closest relatives to pegmatite deposits. Some rare metal granites display pegmatitic cupolas ...

French

Domaine(s)
  • Pétrographie
  • Géochimie
CONT

Les granites hyperalumineux à subalcalins qui contiennent des métaux rares associés à des concentrations de lithium, de béryllium, de niobium et de tantale, ainsi que des minéralisations d'étain et de tungstène [...] s'apparentent le plus aux pegmatites minéralisées. Certains granites à minéralisation de métaux rares comportent des coupoles pegmatitiques [...]

Spanish

Save record 1

Record 2 1977-04-28

English

Subject field(s)
  • Metals Mining
  • Economic Geology
OBS

(...) the metal deposits are concentrated, during the formation of a granitic rock, in inverse ratio to the amounts in which they can be incorporated in the ordinary minerals of the granite. The metallic ions, thus concentrated, have been "rejected", as it were, by the granite. This would depend particularly on the ionic radii and charges. Offhand these points of view could explain the singular concentrations of lead, zinc and copper, metals rare in the Earth's crust with respect to its average chemical composition, but nevertheless accumulated in enormous tonnages in some perigranitic deposits.

French

Domaine(s)
  • Mines métalliques
  • Géologie économique
OBS

D'après [Sullivan et Guimaraes] les gîtes métallifères sont concentrés pendant la formation d'une roche granitique en raison inverse de l'ampleur avec laquelle ils peuvent être incorporés dans les minéraux ordinaires du granite. Les ions métalliques ainsi concentrés ont été "refusés" pour ainsi dire par le granite. Ceci dépendrait particulièrement des rayons et charges ioniques. L'apparition de micro-inclusions autonomes d'oxydes ou de sulfures métalliques dans les granites s'accorde avec cette vue (magnétite, ilménite, pyrite, uraninite, etc.).

Spanish

Save record 2

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